KR20100102567A - The advanced water treatment method using the sintered multi-functional fine bubble diffuser for aeration as well as filtration - Google Patents

Abstract

PURPOSE: A high water treatment method is provided to enhance contact area between vapor-liquid and to improve material transfer efficiency between vapor-liquid. CONSTITUTION: A high water treatment method is performed using a multifunctional sintering material micro bubble generator. A porous sintering body has high pore rate and constant pore size distribution. The sintering body is able to generate constant and micro bubble in the water. The micro bubble generator manufactured by sintering method is able to separate/filter microparticles of water pollution.

Description

Advanced water treatment method using the sintered multi-functional fine bubble diffuser for aeration as well as filtration}

The present invention is an efficient aerobic reaction tank or pressurized flotation tank, purified water treatment plant, village water supply / groundwater such as sewage terminal treatment plant, wastewater treatment plant, village sewage treatment plant, aerobic fermentation tank, etc. It relates to a fine bubble diffuser (fine bubble diffuser) for supplying. In particular, the immersion type filtration method is commonly used for the physical advanced treatment of the water treatment process, the present invention is not only to deliver oxygen to aerobic microorganisms in biological water treatment process, but also stainless steel material that can be used in combination with immersion filtration means to The present invention relates to an advanced water treatment method provided with a multi-functional sintered material microbubble generator made of a synthetic resin material.

As water pollutants in untreated sewage water flow into rivers, lakes and other sources, many problems arise in efficient water quality management.

Sewage water treatment technologies include physicochemical methods such as filtration facilities, chemical flocculation and sedimentation, and biological treatment methods to remove various contaminants by maximizing the metabolic processes of microorganisms in a bioreactor containing activated sludge. The physicochemical method has the advantage that it can be installed and used additionally without major changes to the existing treatment facility, and it has the advantage of obtaining stable and high efficiency treatment effect. There is a disadvantage in that there is a large amount of processing by-products in some cases. Biological treatment method is more advantageous than physicochemical method in terms of cost-effective treatment efficiency and is used in most domestic and foreign wastewater treatment plants as main treatment process for treating large-scale sewage.

The aeration apparatus used in the aeration process, which is the main stage of the biological sewage treatment process, can be classified as follows according to the installation location. The first is an aeration device for the diffusion of the supply gas installed in the bottom of the sewage treatment plant, commonly referred to as an air diffuser. The second is an underwater agitator or turbine type aeration device installed in the water, and the third is a mechanical surface aeration device. . Among them, other aeration devices except diffuse engines generally require excessive facilities and operating expenses such as a large amount of operating energy, a large installation space, and problems such as maintenance, maintenance, and noise of moving parts. On the other hand, the diffuser is one of the important water treatment-related environmental equipment items that have been developed in various materials and forms due to its advantages such as relatively high efficiency, easy operation and small installation space.

Sewage water treatment facilities consume a large amount of power, of which the power consumption of aeration facilities that supply dissolved oxygen to sewage water amounts to 40-50% of the total power consumption of sewage and wastewater treatment. Accordingly, the oxygen-transfer characteristics between the gas and the liquid, such as the amount and rate of oxygen delivered to the sewage in the liquid phase, are the main factors that determine not only the performance and throughput of the wastewater treatment process but also its operating cost. However, most of the industrial engines that are currently in operation are installed and operated in the past 10 years, and the design references for the industrial engines are insufficient at the time of design. It has been designed in rolls or mechanical ways. In addition, since it was installed without verification of the oxygen transfer efficiency of the diffuser produced by each manufacturer, it is impossible to expect normal treatment efficiency and evaluation of power consumption has not been made. Even if the same amount of air is supplied to the sewage by using an acid pipe, the amount of oxygen dissolved in the waste water varies depending on the characteristics of the acid pipe applied.

The representative indicator of the performance of the diffuser is the standard oxygen transfer efficiency (SOTE). Even if the diffuser is supplied with the same flow rate to the wastewater, it is dissolved in the wastewater according to the characteristics of the diffuser. The amount of dissolved oxygen (DO) varies. Various methods are available to increase the oxygen transfer efficiency of the diffuser, but three main factors should be considered. The first is to increase the contact area between continuous wastewater and air by creating a small and uniform bubble, and the second is to increase the contact time between the bubbles and the wastewater as much as possible by lengthening the bubble path. Oxygen in the bubble is transferred to the raw water by the diffusion occurring at the interface between the wastewater and the wastewater, so that energy of ultrasonic bubbles or acoustic resonance is supplied to the bubble to increase the dissolution rate of oxygen.

Currently used diffusers are classified into (1) porous acid generators, (2) nonporous acid generators, and (3) other acid generators (injection type, aspiration type, U tube, acoustic resonance type, etc.).

The bubble size generated from the diffuser is one of the important factors that determine the performance of the diffuser, and is generally used as a standard for classifying diffuser types. The bubble size generated in the diffuser can be measured using an electrical resistance probe method, an acoustic measurement method, or a direct imaging method.

Fine bubble diffusers exhibiting high oxygen transfer efficiency include membrane, ceramic, and cone type diffusers, and coarse bubble diffusers exhibiting low oxygen transfer efficiency. Diffusers, such as bead-filled and acoustic resonance, are used. Each diffuser has its own advantages and disadvantages, so the environmental conditions to be installed, the costs of installation and operation, and the main purpose of use should be considered. In particular, the most suitable air dispersing means for the advanced treatment method for sewage water, which has recently been developed rapidly, should be devised, and the optimal high water treatment efficiency can be expected from this.

For example, Republic of Korea Registration Proposition 20-0368391 is provided with a bolt connection part formed in the center and an air chamber formed around the bolt connection part, and an air nozzle grooved at a predetermined size and at a predetermined interval adjacent to the air chamber. Due to its large shape, the outer surface is inclined, and the nut for assembling the disks is combined with the bolts and bolts provided with the vent pipe, and the lower part is connected with the air inlet pipe, and the upper part is the hemisphere to which the disk with the air hole is coupled. The present invention relates to a conical multi-stage diffuser device consisting of a backflow prevention unit provided with a ball inside a container of the shape, and is designed to prevent sludge lamination and to generate air bubbles by adjusting an air nozzle.

On the other hand, Korean Patent No. 10-0503680 improves the oxygen transfer efficiency of the air diffuser by improving the outlet of the air diffuser in which air is discharged, and the inlet through which the air enters, and the air introduced through the inlet rotates the vortex. And a chamber for generating acoustic resonance, a guide installed at the center of the lower surface of the chamber, the diameter of the chamber being increased toward the top thereof, and the outer circumference of the horizontal cross-section being circular, and smoothly rotating the air flowing from the inlet. A diffuser using a rotational force and acoustic resonance, which is formed in a ring shape by a gap between the chamber and the guide, and is composed of an outlet in which air made of a rotating vortex is supplied into the water while obtaining acoustic energy generated by the chamber. It is about a device, which dissolves oxygen by supplying acoustic resonance energy rather than expecting microbubbles. Invention is to increase the Figure.

However, the conventional means for discharging wastewater for wastewater is a simple function of delivering only oxygen to an aerobic tank, and is insufficient in a multifunctional role such as filtration of pollutants and complete mixing of activated sludge.

In addition, the conventional biological advanced treatment technology is basically using a standard activated sludge process consisting of a bioreactor for removing organic matter, nitrogen and phosphorus, and a precipitation facility for obtaining clear treated water through solid-liquid separation. The characteristics of each process will generally depend on the placement and number of bioreactors, the sludge return location from the settling tank, the internal return location between each reactor, and the application of microbial media to maximize biological treatment capacity.

However, in the conventional biological advanced treatment method, it is difficult to maintain the concentration of microorganisms because the solid-liquid separation of microorganisms and treated water is carried out in the sedimentation tank by gravity sedimentation. The swelling phenomenon of microorganisms can cause deterioration of treated water quality or the loss of active microorganisms, which causes many problems in efficient treatment. In addition, two to five or more independent reaction tanks and terminal settling tanks are required depending on the process, and thus, a large site is required, which is not suitable for small and medium-scale advanced processing. In addition, due to the qualitative and quantitative characteristics of domestic wastewater, which has a low concentration of organic carbon sources and a large change in pollutant loads depending on the season, its performance is often poor. In particular, in order to treat dissolved organic matters such as taste, odor causing substances, endocrine disruptors and trace harmful substances, physicochemical advanced treatment is required in addition to biological treatment.

Republic of Korea Patent Registration No. 20-0290102 and Patent No. 10-0843656 relates to the advanced treatment of sewage water using MBR (Membrane Biological Reactor), an immersion type separation membrane, and in particular, Republic of Korea Patent 10-0843656 relates to an advanced treatment system using a two-stage immersion type separation membrane In more detail, the present invention provides a high-purity water treatment apparatus using an immersion type membrane consisting of a process of repeating and discharging the process of filtration-air washing and backwashing. After the flocculant and raw water are mixed and transported to the flocculation tank through the in-line admixture, in the flocculation tank, the flocculation efficiency is increased by adjusting the pH, and then filtered through the first stage immersion membrane filtration tank and the second stage immersion membrane filtration tank. A system for supplying treated water, wherein the membrane filtration tank is continuously filtered and simultaneously passed through a lower diffuser. And the supply at the same time, intermittently backwashing which relates to a process for cleaning a submerged membrane by maximizing the efficiency of the separator. However, since the immersion type membrane is used only as a filtration means, a separate air injection diffuser and aeration tank are required.

Republic of Korea Patent No. 10-0843970 and Republic of Korea Patent Publication No. 10-2010-0056429 relates to a method for generating micro-bubbles that can generate a large amount of ultra-fine bubbles by the dissolved air flotation method (DAF), inhaling gas and liquid at high pressure By using a high pressure pump and a pressure tank in which air can be dissolved to generate fine bubbles, there is a disadvantage that expensive mechanical equipment with high risk as described above is required.

Republic of Korea Patent Registration 10-0844141 discloses a silica or alumina ceramic diffuser (ceramic diffuser), a ceramic diffuser manufacturing method and a contaminant floating method using the acid pipes to float the contaminants in the water to generate ultra-miniature bubbles for solid-liquid separation On the other hand, while applying a low air pressure of about 1 atm or less is an invention that can generate a micro bubble uniformly and uniformly, while the ceramic diffuser is manufactured by pressing while applying a vibration, or by being manufactured by an extrusion molding method, Silica or alumina powder fine particles form a wide pore distribution in which the pore size increases from the surface to the inner center, and the ceramic material has the disadvantage of being 'brittle' even with a small impact.

As we have seen, it goes beyond the concept of advanced sewage water treatment, and it is a high-level treatment of BOD / COD and SS, removal of pathogenic microorganisms, stable water pollution treatment regardless of season, removal of natural radioactive materials, and treatment of trace harmful substances. The development of new paradigm technology is essential to enable advanced treatment and produce optimally treated water at minimum cost, and to enable sewage treatment at a level that can be truly reused in terms of water quality, quantity, and economics. to be.

Republic of Korea registration plan 20-0368391 (Nov.11, 2004)

Republic of Korea Patent Registration 10-0503680 (2005.07.16)

Republic of Korea Registration No. 20-0290102 (2002.09.10)

Republic of Korea Patent Registration 10-0843656 (2008.06.27)

Republic of Korea Patent Registration 10-0843970 (2008.06.27)

Republic of Korea Patent Publication 10-2010-0056429 (2010.05.27)

Republic of Korea Patent Registration 10-0844141 (2008.06.30)

An object of the present invention is to increase the contact area between the gas and liquid, and to increase the material transfer efficiency between the gas and liquid in a process requiring a micro bubble, such as aerobic aeration tank, the uniform and fine bubbles are widely dispersed in water / The present invention provides a microbubble generator that does not deform in a pore shape even in a long operation time as well as to be able to diffuse.

Another object of the present invention in the standard activated sludge process and biological advanced treatment process, not only deliver oxygen to aerobic microorganisms, but also a multifunctional immersion equipped with a microbubble generator for the filter bottle that can separate / filter the water pollution microparticles in the aeration holiday The present invention provides a method for constructing a filtration aeration tank so that the conventional "aeration tank + final sedimentation tank + sand filter + activated carbon filter" can be treated in one multifunctional tank. In particular, in order to achieve the above object, when a pore clogging phenomenon occurs in the porous sintered compact for the present invention filter bottle, the back-washing method for recovering the pores of the porous sintered body to its initial state by its own operation mode is provided. Should be.

Another problem to be solved by the present invention is to easily generate ultra-micro-foams in a process that requires ultra-micro-foams, such as pressurization, to simplify the expensive facilities of high risk, drinking water treatment, such as water treatment, village water supply / groundwater The facility is capable of removing more than 60% of volatile organic compounds (VOCs), including radon (Rn), a natural radioactive substance, as well as permanent and porosity to increase the dissolved oxygen concentration (DO) to obtain healthy drinking water. It is to provide an advanced water treatment method equipped with a high filter unit diffuser means.

In order to solve the above problems, the microbubble generating portion of the present invention, the microbubble generator for the filter bottle is manufactured by the 'sintering' method to have a uniform pore size distribution (pore size distribution) and high porosity (porosity) Uniform and fine bubbles are generated in the air to increase the contact area between the gas and the liquid, and increase the material transfer efficiency between the gas and the liquid. In particular, in order to overcome the disadvantages of the conventional diffuser material in the material of the bubble generation portion, in the present invention, the stainless steel material or synthetic resins so that the shape and size of the pores are not permanently deformed. The material is used, and the microbubble generator manufactured by the sintering method is provided with a bubble diffusion induction plate such as horizontal, inclined, multi-tilt, rotary, and horizontal installation type so that uniform microbubbles generated from the microbubble generator are widely distributed in water. / Spread.

The microbubble generator for the filter bottle of the present invention, in the standard activated sludge process and biological advanced treatment method, not only deliver oxygen to the aerobic microorganism, but also microbubble generator for the filter bottle to separate / filter the water pollution microparticles in the aeration holiday By providing a multi-functional immersion filtration aeration tank provided to provide a method for processing "aeration tank + final sedimentation tank + sand filter + activated carbon filter" all in one multi-function tank. In particular, when the pore clogging phenomenon occurs in the porous sintered compact for the present invention, the present invention is to provide an air to air + liquid back-washing method to restore the pores of the porous sintered body to its initial state by its own operating mode. .

By applying the porous sintered body of the present invention to easily produce ultra-micro-strength fabrics in the process requiring ultra-micro-foam foams such as pressure flotation, it is possible to simplify expensive facilities with high risk, and to drink water treatment facilities such as water treatment, village water supply / ground water, etc. High porosity porous sintered acidizer which can remove more than 60% of volatile organic compounds (VOC) including radon (Rn), which is a natural radioactive material, and increase the dissolved oxygen concentration (DO). It is an object of the present invention to provide an advanced water treatment method.

According to the present invention, the porous sintered body of the microbubble generator for the filter bottle manufactured by the 'sintering' method has a uniform pore size and high porosity, thereby generating uniform and fine bubbles in water, thereby contacting the gas-liquid. It increases the area and increases the material transfer efficiency between the gas and the liquid. In particular, the bubble diffusion induction plate is provided in the microbubble generator manufactured by the sintering method so that uniform microbubbles generated from the microbubble generator are widely dispersed and diffused in the water, thereby greatly increasing the oxygen transfer efficiency in the water. The porous sintered body of the high efficiency microbubble generator with improved oxygen transfer efficiency and agitation efficiency has the effect of significantly reducing the power required in the sewage treatment plant.

The microbubble generator for the filter bottle of the present invention, in the standard activated sludge method and biological advanced treatment method, not only delivers oxygen to the aerobic microorganism but also a multifunctional immersion filtration aeration tank to separate / filter the water pollution microparticles in the aeration holiday. By providing a method to handle aeration tank + final sedimentation tank + sand filter + activated carbon filter in one multifunctional tank and backwashing method to restore pores of the sintered body blocked in its own operation mode to the initial state. In addition, it has a great effect in economic aspects such as installation site reduction and ease of operation.

On the other hand, in drinking water treatment facilities such as purified water treatment, village water supply / ground water, immersion filtration-type multi-functional aeration tank to which the sintering material micro-bubble generator for the filter bottle of the present invention is applied, volatile organic compounds (VOC) including radon (Rn) which is a natural radioactive material Not only can remove 60% or more, but also increase the dissolved oxygen concentration (DO) to provide healthy drinking water.

By applying the present invention the sintered material ultra-micro-foam generator in a stepwise manner to the pressure flotation tank that requires ultra-micro-foaming bubbles, ultra-high-strength bubbles are easily generated without high pressure pump for liquid circulation, dissolved oxygen pressure tank, gas dispersion plate and micro bubble rising guide wall. In addition, since the circulation of the treated water can be eliminated, there is an effect that the total throughput of the pressure relief tank is greatly increased.

The porous sintered body for the filter bottle of the present invention has the effect of reducing the power consumption due to the high oxygen transfer efficiency in the aeration process, simplification and installation of the facility in the high water treatment process such as filtration / separation process, pressurized flotation process, water treatment treatment, village water supply / groundwater. Due to the reduction of site and ease of operation, it has a great effect on the reduction of greenhouse gas, water reuse project and water shortage which are the main culprit of global warming.

1 is a system flow diagram of a standard activated sludge process for a typical wastewater,
Figure 2 is a processing system diagram of a typical nitrogen / phosphorus removal A2 / O biological treatment method,
Figure 3 is a typical conventional wastewater generation air diffuser,
4 is a block diagram of a sintered material micro-bubble generator for filter bottles with a horizontal bubble diffusion induction plate according to the present invention,
5 is a block diagram of a sintered material micro-bubble generator for filter bottles with a gradient bubble diffusion induction plate according to the present invention,
6 is a block diagram of a sintered material micro-bubble generator for a filter bottle equipped with a multi-tilt bubble diffusion guide plate according to the present invention,
7 is a block diagram of a sintered material micro-bubble generator for filter bottles with a rotary bubble diffusion guide plate according to the present invention,
8 is a block diagram of a sintered material micro-bubble generator for horizontal installation type filter bottle with a bubble diffusion induction plate according to the present invention,
9a and 9b is an example of the sintered material micro-bubble generator for the filter bottle provided with a horizontal bubble diffusion induction plate of the present invention,
10a and 10b is an example of the sintered material micro-bubble generator for the filter bottle provided with the inclined bubble diffusion guide plate of the present invention,
11a and 11b is an embodiment of the sintered material micro-bubble generator for the filter bottle provided with the inclined bubble diffusion guide plate of the present invention,
12a and 12b is a test equipment and pressure loss test results of the sintered material micro-bubble generator for a filter bottle equipped with a bubble diffusion induction plate of the present invention,
13A and 13B are an elevation view of an immersion filtration intermittent aeration tank and a fully mixed immersion filtration multistage aeration tank in which the sintered material microbubble generator for the filter bottle of the present invention is carried out,
14 is an elevational view of a typical conventional pressurization tank;
15 is an embodiment of the water contaminant floating flotation tank subjected to the present invention sintered material ultra-miniature bubble generator.
<Description of the code | symbol about the principal part of drawing>
1: settler 2: first clarifier
3: Activated sludge aeration tank 4: Final clarifier
5: Disinfection and discharge tank (final treatment tank) 6: Sludge thickening tank / digestion tank
7: sludge dewatering device 8: sand filter
9: activated carbon filter (A / C filter) 10: air blower (air blower or compressor)
11: conventional air diffuser 12: bubble
14: anaerobic 15: anoxic tank
16: aerobic tank 17: biological media
18: chemical flocculation reactor
20: Sintered material microbubble generator for filter bottles with horizontal bubble diffusion guide plate
21: horizontal bubble diffusion plate 22: upper microbubble generating unit
23: microbubble main generator 24: lower microbubble generator
25: female connector
30: sintered material microbubble generator for filter bottles with gradient bubble diffusion guide plate
31: Inclined bubble diffusion guide plate
40: Sintered material microbubble generator for filter bottles with multi-inclined bubble diffusion guide plate
41-43: Multiple Inclined Bubble Diffusion Induction Plate
50: sintered material micro-bubble generator for filter bottles with rotary bubble diffusion guide plate
51: rotary bubble diffusion guide plate 52: rotational axis of bubble diffusion guide plate
53: rotating part of the bubble diffusion plate
60: Sintered material microbubble generator for filter bottles with horizontal installation bubble diffusion guide plate
61: horizontally installed bubble diffusion guide plate 70: submerged filtration type micro bubble intermittent aeration tank
71: fine bubbles 72: gaseous valve
73: liquid valve 74: liquid suction pump (suction pump)
75: differential pressure (ΔP) detector 76: sludge pit
80: Fully mixed immersion filtration multistage aeration tank
85: coarse bubble 90: conventional pressurized buoyancy tank (DAF)
91: high pressure pump for liquid phase 92: dissolved oxygen pressure tank
93: air filter 94: air compressor (compressor)
95 gas distributor 96 pressure regulator
98: microbubble generating nozzle 99: microbubble rising induction wall
100: Floating tank of water polluted particles with sintered material
101: ultra-fine foam generator sintered material 102: ultra-fine foam for floating water pollution particles

The present invention will now be described in detail with reference to the accompanying drawings.

1 is a flow diagram of a typical standard activated sludge process that is the basis of biological methods for wastewater treatment.

In FIG. 1, wastewater, such as household sewage and industrial complexes, is first removed from the sedimentation tank 1 and the initial sedimentation tank 2 by sand, sediment, contaminants, etc. by physical methods and gravity sedimentation. The settling tank 1 and the initial settling tank 2 are replaced by a flow adjusting tank equipped with a screen. Firstly, the influent sewage water is first precipitated in the sedimentation tank (1) and the lowest sedimentation tank (2), and then the front part of the aeration tank (also referred to as an aerobic tank or aeration tank) in which the primary treated supernatant and the return sludge have a large amount of activated sludge. The oxygen supply to the aerobic microorganisms and the activated sludge are mixed well in the aeration tank 3 by the air supply diffuser 11 or a mechanical aeration (not shown). In general, the air is injected evenly into the aeration tank (3) length, and during the aeration time, the adsorption, flocculation, and oxidation between the organic matter and the activated sludge floc occurs, and the organic matter is converted into biologically activated sludge (MLSS). After the reaction in the aeration tank (3) for a certain residence time, the activated sludge and the treated water are transferred to the final settling tank (4) to be separated and precipitated. The supernatant purified by sedimentation and separation in the final sedimentation tank (4) is passed through a sand filter (8) and an activated carbon filter (9) to increase the removal efficiency of residual pollutants, and then naturally discharged into a disinfection discharge tank (5), which is a disinfectant. Sterilization and final discharge by (13). Part of the activated sludge precipitated in the final settling tank (4) is returned to the front of the aeration tank (3) to be used as a feed material for the microbial mechanism, and some excess sludge is passed through the sludge thickening tank / digester (6) and dehydrator (7) Withdrawn / removed.

Typical operating conditions of the standard activated sludge process of FIG. 1 include hydraulic retention time (HRT) of 4 to 8 hours, solids retention time (SRT) of 5 to 15 days, and organic load factor (F / M ratio) of 0.2 to 0.6 kgBOD. / MLSS / d, the treatment efficiency for pollutants is 85-90% for BOD, 85-90% for SS, 20-30% for total nitrogen (TN), and total phosphorus (TP) It is reported that the treatment efficiency for nutrients is as low as 10 to 25% (addition of aggregates: 70 to 80%, but adverse effects on microorganisms should be considered).

Therefore, advanced sewage treatment technology should be devised to remove nitrogen (T-N) / phosphorus (T-P), which is the main cause of eutrophication.

FIG. 2 shows the processing system of the A2 / O (Anaerobic / Anoxic / Oxic) process, which is a biologically advanced treatment method for efficiently removing nitrogen / phosphorous nutrients from sewage water. The anaerobic tank (14, anaerobic)-anaerobic tank is a biological reaction tank. (15, anoxic) -aeration tank (16, aerobic) consists of a three-stage biological reactor and a physicochemical treatment process before and after the biological reactor.

In the conventional wastewater treatment process, the biological reaction tank of the standard activated sludge method is composed of only the aeration tank 3 of activated sludge so that the treated water treated in the aeration tank 3 is discharged after being precipitated in the final settling tank 4. However, the wastewater treatment method has a low removal efficiency of nitrogen and phosphorus as described above, which is a major factor of eutrophication when discharged into rivers. In order to solve this problem, an A2 / O sewage treatment method consisting of an anaerobic tank 14, an anaerobic tank 15, and an aeration tank 16 has been developed and used. In the A2 / O system, the anaerobic tank 14 and the anaerobic tank 15 are installed in the previous stage of the aeration tank 16, and the treated water returned from the aeration tank 16 is returned to the anaerobic tank 15 to provide nitrate nitrogen (NO ₃ -N). ) And return some of the activated sludge precipitated in the final settling tank (4) to the anaerobic tank (14) to maintain a constant concentration of microorganisms throughout the reactor, as well as to release phosphorus in the anaerobic state and in the subsequent aeration tank (16) By ingesting excess phosphorus, phosphorus is drawn / removed in the excess sludge state.

In the typical wastewater A2 / O (Anaerobic / Anoxic / Oxic) process of FIG. 2, the wastewater is the main reaction process A2 / O biological reactor consisting of three stages of anaerobic tank (14)-anoxic tank (15)-aeration tank (16). Water nutrients such as BOD, COD, SS, etc., especially nutrients such as nitrogen and phosphorus, which act as the causative agents of eutrophication, are removed. Flocs formed by microbiological mechanisms in the sewage water treated secondarily by biological methods and aggregates formed by chemical agglomeration reactions 18 are precipitated by gravity in the final settling tank 4, some of which are returned to shear and surplus The sludge is drawn off through the sludge thickener tank 6 and the dehydrator 7. The supernatant in the final sedimentation tank (4) is filtered by the sand filter (8) and activated carbon filter (9), and the final treated water is disinfected in the disinfection discharge tank (5), and the final discharge of the conventional wastewater is generally discharged. It is a treatment process.

As described above, the three-stage A2 / O process of the anaerobic tank (14), anoxic tank (15), and aerobic tank (16) is carried out from a nitrification recycle for removing nitrate nitrogen and a settling tank (4) for phosphorus removal. It is composed of the external return of the sludge, which releases phosphorus in the anaerobic tank 14 and enables the microorganism to ingest the phosphorus in the aerobic tank 16 to increase the content ratio of total phosphorus in the activated sludge to increase the phosphorus removal rate in the sewage. In the anoxic tank 15, the nitrogen in the sewage is removed by denitrifying and converting the nitrate in the internal return water from the aerobic tank 16 into nitrogen gas. The treatment efficiency of the A2 / O method is generally reported to be 90% or more of BOD removal rate, 90% or more of SS, 40 to 70% of T-N, and 60% of T-P. HRT is operated for 5 to 8 hours (anaerobic bath: 0.5 to 1.0 hour, anaerobic bath: 0.5 to 1.0 hour, aerobic bath: 3.5 to 6.0 hour), SRT for 4 to 27 days, and external sludge transfer rate (RAS) for 25 to 50 hours. % And an internal conveyance rate are about 100 to 200% of the amount of inflow water.

The advanced biological treatment of nitrogen / phosphate wastewater developed to date is more than 90%, mostly the modified A2 / O method of FIG.

As described above in the typical biological sewage treatment process of FIGS. 1 and 2, the oxygen supply through the air injection is indispensable for the aerobic microorganism activity and the smooth mixing of activated sludge in the biological treatment process.

In the biological sewage treatment process, dissolved oxygen (DO) concentration in the aeration tank (3,16) is the most basic growth condition of aerobic microorganisms together with the substrate in the influent and is generally dissolved in DO 1.5 to 3.5 ppm. Oxygen concentration is required for aerobic microorganisms, the air injection through the air diffuser can be said to be the activation method of aerobic microorganisms and stirring the wastewater. However, it is not easy to maintain dissolved oxygen concentrations of about 1.5 to 3.5 ppm in summer, when the activated sludge concentration (MLSS) in the aeration tank is high or the water temperature rises. In order to dissolve oxygen to DO 1.5 ~ 3.5 ppm in the aeration tank (3,16), using the fine bubble diffuser with high standard oxygen transfer efficiency (SOTE), the target dissolved oxygen concentration is less power. Although the bubbles generated from the acid pipes are too small microbubbles, the stirring effect of the activated sludge is insignificant. On the contrary, the use of an acid pipe generating coarse bubbles results in a significant stirring effect of the activated sludge. This is because the oxygen transfer efficiency is low and the required power is high. Therefore, a method for constructing an aeration tank excellent in oxygen transfer efficiency as well as stirring effect of activated sludge should be devised.

3A to 3F show representative air diffusers currently used for oxygen supply in aeration tanks 3 and 16 in biological sewage treatment processes, while FIGS. 3A and 3B are inexpensive but oxygen transfer efficiencies (fresh water). The actual shape, the front view, and the plan view of the side spray type (Fig. 3a) and the bead-filled type (Fig. 3b) nonporous diffuser which generate coarse bubbles, which are low by about 10 to 16%). Since the nonporous diffuser shown in FIGS. 3A and 3B has low oxygen transfer efficiency, it is preferable to install a septic tank in which a high oxygen transfer efficiency is not required or for agitation of a wastewater treatment tank having a depth of 7 m or more.

On the other hand, Figs. 3c to 3f are porous to conical nozzle-type (Fig. 3f) diffuse engines that produce fine bubbles having an oxygen transfer efficiency of 25% or more at a depth of 5 m of fresh water. 3C to 3D is an acid pipe called a synthetic rubber membrane called EPDM (Ethylene Propylene Diene Monomer), and even after a very uniform and minute bubble is generated at the initial stage of operation, the corrosion resistance of wastewater is increased after several months. Due to the lack of elasticity of the rubber. Accordingly, the size of the bubble nozzle may be several times larger, leading to a decrease in oxygen transfer efficiency due to an increase in bubble size, as well as a backflow of the liquid phase when the air injection is stopped. The diffuser of the ceramic material of FIG. 3e is an ultra-fine foamed diffuser that can overcome the disadvantages of the EPDM synthetic rubber material, but can exhibit the highest oxygen transfer efficiency, but has high pressure loss and facilitates microorganisms in the ceramic material. Not only can the pores be blocked by evaporation, but they are expensive. The diffuser of FIG. 3f is designed to prevent sludge stacking as much as possible by stacking disks having bubble generating nozzles in multiple stages in a conical shape (Korean Registered Property 20-0368391), which is an air blower (10, blower). Repeated vibration due to the tendency to loosen the connection to the pipe or the multi-stage disk is also unstable factors for long-term use.

In an acid pipe, the oxygen transfer efficiency is generally one or more acid pipes to be tested in a water tank of 5 m depth, filled with test water (fresh water), and then sodium sulfite (Na ₂ SO ₃ ) and cobalt chloride (CoCl ₂ ). After removing the dissolved oxygen in the water by degassing, the dissolved oxygen is measured using DO-meter at unit time interval in the upper part of the tank (4.5m depth) while giving up a certain amount of air to the installed diffuser. The overall oxygen transfer coefficient (K _L a) and oxygen transfer efficiency (SOTE) are calculated.

In addition, the bubble size generated from the diffuser is one of the important factors that determine the performance of the diffuser, and is generally used as a criterion used to classify the diffuser. The size and distribution of bubbles generated from the diffuser can be measured using an electrical resistance probe method, an acoustic measurement method, or a direct imaging method.

Table 1 summarizes the characteristics of the microbubble generator made of the conventional diffuser and the porous sintered body of the present invention to be described below and the standard oxygen transfer efficiency (fresh water standard) at a depth of 5 m, the oxygen transfer efficiency of 20 ℃ fresh water standard Therefore, the oxygen transfer efficiency (SOTE) in the sewage treatment plant can be lowered due to the viscosity and water temperature difference due to the activated sludge concentration.

TABLE 1

Recently, the reduction of carbon dioxide (CO ₂ ), a greenhouse gas that causes global warming, has emerged as an environmental issue. In the water environment field of the present invention, a high-efficiency diffuser device capable of reducing power consumption is used. It is very easy to do. The wastewater treatment facility consumes a large amount of power, and the power consumption of the aeration system that supplies dissolved oxygen to the wastewater reaches 40 to 50% of the total wastewater treatment power consumption. In order to reduce energy, the diffuser can be said to reduce the number and operating time of the blower (10, blower) by maximizing the oxygen transfer efficiency.In order to increase the oxygen transfer efficiency of the diffuser, the air bubbles generated by the diffuser can be minimized. It must be fine and uniform to increase the gas-liquid contact area, ie the bulk total specific surface area of bubbles in the water. In addition, the pressure loss on the diffuser should be kept as low as possible so that a sufficient amount of air bubbles can be generated with a low blower pressure. Especially in reaction tanks and water treatment tanks requiring agitation effect, a large amount of air is essential under low pressure loss.

4 to 8 is a block diagram of a sintered material microbubble generator for a filter bottle equipped with a bubble diffusion induction plate according to the present invention, which is intended to solve the above-described problems in a conventional diffuser.

The present invention of Figures 4 to 8, in order to overcome the disadvantages of synthetic rubber material called EPDM (Ethylene Propylene Diene Monomer) which is the diffuser material of Figures 3c to 3d on the material of the bubble generation, the present invention In order to ensure that the pore shape and size are not permanently deformed, stainless steel or synthetic resins are used, and manufactured by 'sintering' method to secure a constant pore shape and pore size. In order to prevent the fine bubbles generated from the present invention are dispersed / diffused as widely as possible in water and coalesced into large bubbles, various types of bubble diffusion induction plates are provided to match the target water quality. It is a feature of the present invention to not only generate a fine bubble but also to perform a filtration function.

Republic of Korea Patent Registration 10-0844141 relates to a silica or alumina ceramic diffuser (ceramic diffuser) for generating micro-bubbles in water, so that even if a small air pressure of about 1 atm or less is applied to uniformly and uniformly generated On the other hand, the ceramic diffuser is produced by pressurizing while imparting vibration, or by extrusion molding, so that the silica or alumina powder fine particles form a wide pore distribution whose pore size increases from the surface to the inner center, Ceramic material is an invention that has the disadvantage of being 'brittle' even with a small impact.

4 is a block diagram of a sintered material micro-bubble generator 20 for a filter bottle provided with a horizontal bubble diffusion guide plate 21 according to the present invention. 4 is a main manufacturing process of the present invention, in order to solve the disadvantages of the material of the ceramic diffuser and the distribution of a wide pore size, a stainless steel material or synthetic resins material of several μm to several mm powder ( As a method for producing porous sintered objects of uniform pore size by 'sintering' process from powder, it is a kind of technology in powder metallurgy.

Hereinafter, a method of manufacturing a porous sintered body of a metal or a synthetic resin material by sintering will be described.

'Sintering' is a high-precision tool with a pressure of 3 to 7 ton / cm ² , after thoroughly mixing high-purity / compressible powders of particle size distribution with a precision machine. A molding method using a phenomenon in which a press-molded molded body in a proper shape is tightly adhered / solidified when heated to near the melting point. In the present invention, a fine powder of a stainless metal material or a synthetic resin having a particle diameter of several microns (μm) to several millimeters (mm) is used. The molds were placed in a mold and pressed to high pressure with a press to form a design shape, and when heated to a temperature close to the melting point of the material, diffusion bonding was performed on the surfaces where the powders were in contact with each other, or a part was deposited and connected to each other. One rigid porous sintered object is formed, which is controlled by controlling the particle size distribution of the powder used as design material. It is possible to determine the pore-grade (grade porosity) of a uniform pore size of the sintered body.

In the production of porous sintered objects, the use of stainless metal powder as a raw material can produce a porous metal sintered product with excellent corrosion resistance, heat resistance and durability. Inexpensive and excellent chemical resistance porous resin sintered body can be produced.

The porous sintered body produced by the sintering method as described above, the pore of the final sintered body can be easily determined to 0.01 ~ 100 μm class by controlling the particle size of the powder used as a raw material, and the powder having a uniform particle size In this case, the porosity is superior to the conventional products produced by simple pressing, and it can be manufactured in various shapes, and the pore shape does not deform even after repeated use of the final sintered body, and has two or more particle sizes. When the powder is used as a raw material, the final porous sintered objects produced by the sintering method have many advantages, such that the final sintered body having various pores can be obtained.

Therefore, the porous sintered body manufactured by the above method is an air pollutant filter means under high temperature and high pressure that can replace a ceramic material and a bag filter, a filter in the hydraulic / pneumatic field, a silencer and a backfire prevention Means, porous sintered body has been tried in various fields such as petrochemical / electronics / pharmaceuticals, ultra-precision disinfection / dehumidification / oil removal filter means of 0.01 μm or less as corrosion protection material in an environment where corrosion may occur, As a result, a uniform microbubble is generated during aeration for water pollution treatment, and a filter medium for separating contaminant particles is also used in the aeration phase. The porous sintered body blocks itself by repeating an aeration / filtration process. There is no back-flushing technique to restore the pores to their original state.

Figure 4 is a block diagram of a sintered material micro-bubble generator 20 for a filter bottle provided with a horizontal bubble diffusion induction plate 21 according to the present invention, the microbubble main generator 23 and the sintering produced by the sintering method It consists of a microbubble generating unit 22 of the upper material, the lower microbubble generating unit 24, the pipe connecting portion 25 that can be connected to the main air pipe, in particular the microbubble generating unit 22, 23, 24 which is a porous sintered body The foam diffusion guide plate 21 is provided to effectively disperse in the water in the form of small bubble particles while preventing the fine bubbles () produced by the coalescence in the water.

FIG. 5 is a schematic diagram of a sintered material microbubble generator 30 for a filter bottle provided with an inclined bubble diffusion induction plate 31 according to the present invention, FIG. 5 than in the horizontal bubble diffusion induction plate 21 provided in FIG. Application of the inclined bubble diffusion induction plate 31 can more effectively induce bubble coalescence in water, bubble dispersion and stirring of activated sludge. This is because in the bubble diffusion induction plate, the inclined induction plate 31 shortens the instantaneous retention amount and the residence time of the bubbles at the local point under the guide plate than in the horizontal type 21. Therefore, the sintered material microbubble generator 20 for the filter bottle provided with the horizontal bubble diffusion induction plate 21 of the present invention can be easily applied to a septic tank or a simple village sewage treatment plant, while having a deep and active microbial concentration ( MLSS) is preferably applied to the sintered material micro-bubble generator 30 for the filter bottle provided with the inclined bubble diffusion guide plate 31 of the present invention to a medium to large wastewater treatment plant with high MLSS.

The inclined bubble diffusion induction plate 31 of FIG. 5 is designed to further implement the above advantages of the inclined guide plate, in particular, when the size of the microbubble generator of the large water treatment process or the present invention is increased. Bubble diffusion induction plate (41, 42, 43) may be provided, the configuration of the sintered material micro-bubble generator 40 for the filter bottle provided with the multi-inclined bubble diffusion induction plate (41, 42, 43) according to the present invention 6, the invention of FIG. 6 is more effective when the water treatment unit is a large processing plant deeper than 5 m.

7 is a block diagram of a sintered material micro-bubble generator 50 for a filter bottle equipped with a rotary bubble diffusion guide plate 51 according to the present invention. In the present invention of FIG. 7, the microbubbles generated from the main generator 23, which is a porous sintered body, are helical while colliding with the rotary bubble diffusion guide plate 51 formed in the shape of a fan blade provided on the main generator 23. Disperse / rise while forming a spiral curve. At this time, the rotary bubble diffusion induction plate 51 is vertically floated along the rotation axis 52 by buoyancy of the generated bubbles and rotates around the rotation part 53 of the bubble diffusion induction plate. 53), it is preferable to use a material with a small coefficient of friction, such as teflon material in order to minimize the frictional force. Spiral rising bubbles (bubble) has a longer time to stay in water than vertically rising bubbles, that is, by increasing the path of rise of the bubbles to maximize the contact time between the bubbles of the dispersed phase and the waste water as possible. Not only does the gas holdup increase, but also the mixing effect by eddy energy also increases, which leads to large sewage treatment plants and fluidized beds or bubble columns. It is more effective to apply the microbubble generator 50 provided with the rotary bubble diffusion guide plate of FIG.

In a typical diffuser (FIG. 3) currently used in sewage treatment plants, FIG. 3C is a rubber tube type air diffuser installed horizontally. 3c, which is a conventional diffuser, is replaced with a high-efficiency microbubble generator that is a porous sintered body of the present invention, the present invention is also advantageous in terms of economical installation in a horizontal direction.

FIG. 8 is a schematic diagram of a sintered material microbubble generator 60 for a horizontal installation filter bottle equipped with a bubble diffusion induction plate 61 according to the present invention. FIG. Although installed in the horizontal direction, the micro-bubbles are generated in the porous sintered body, not synthetic rubber, and the bubble diffusion induction plate 61 is provided to promote the dispersion of the micro-bubbles in water.

9A and 9B are examples of the sintered material microbubble generator 20 for a filter bottle provided with the horizontal bubble diffusion induction plate 21 of FIG. 4, which is an outer diameter (φ, OD) of 53 mm of the porous sintered body. , Length (L, length) 50mm, sintered body thickness (T, thickness) 7mm, the pore size (pore size) of the porous sintered body is 10μm. 9B is an example of a sintered material micro-bubble generator for filter bottles provided with a horizontal bubble diffusion induction plate 21 having a length L of 100 mm of the porous sintered body.

10A and 10B are examples of a sintered material microbubble generator for a filter bottle provided with the inclined bubble diffusion induction plate 31 of FIG. 5, wherein FIG. 10A is an outer diameter (φ, OD) of 53 mm and a length ( L, length) 100mm, sintered body thickness (T, thickness) 7mm, pore size of the porous sintered body (pore size) is 3μm. Figure 10b is a sloped bubble diffusion induction plate 31 having an outer diameter (φ) of the porous sintered body (φ) 70mm, length (L) 140mm, sintered body thickness (T) 8mm, the pore size (pore size) of the porous sintered body is 0.3μm It is an example of the sintering material microbubble generator for filter bottles.

11A and 11B illustrate an embodiment of a sintered material microbubble generator 30 for a filtration bottle equipped with an inclined bubble diffusion guide plate 31 of FIGS. 10A and 10B, which are examples of the present invention. They are effectively dispersed / diffused in water by the inclined bubble diffusion induction plate 31, and the finer the pore size of the porous sintered body at the same air flow rate (3⇒0.3 μm), the more bubbles are generated. It turns out that it becomes fine and uniform.

12a and 12b is a test equipment of the sintered material micro-bubble generator for the filter bottle equipped with a bubble diffusion induction plate of the present invention and the pressure loss test results according to the aeration amount, the test equipment is an air pump, a pressure gauge, a flow meter to inject air It is composed of a liquid suction pump, and the present invention was tested in a small tank in which an actual ecosystem exists. As can be seen in Figure 12b, the pressure loss (load loss) to the porous sintered body of the microbubble generating portion of the present invention increases with the increase in the amount of ventilation, EPDM synthetic rubber diffuser (Fig. 3c, Fig. A pressure loss value similar to 3d) was shown. From Fig. 12B, an appropriate ventilation amount of the present invention, i.e., 50 to 150 L / min (LPM) can be selected.

In the hollow fiber membrane used in MBR (Membrane Biological Reactor), which is a general conventional immersion filtration method, one element of the hollow fiber membrane has a diameter of 2 mm, an inner diameter of 0.8 mm, a length of 1.5 m, and a pore size of 0.1. It consists of the number of strands of about 160 μm, hollow fiber, and the fresh water reference filtration rate of the present invention obtained from the test equipment and Equation 1 of FIG. 12A is several times higher than the filtration rate of the hollow fiber membrane filtration of the conventional hydrophilized PVDF material. The value was several tens of times higher because the porosity of the porous sintered body of the present invention is higher than that of the conventional hollow fiber.

[Equation 1]

The maximum pressure loss, fresh water standard water flow rate and filtration rate per unit filtration area of the present invention are summarized in Table 2 in comparison with the conventional hollow fiber membranes. The number of installations can be estimated.

TABLE 2

Figure 13a and Figure 13b is an elevation view of the immersion filtration intermittent aeration tank 70 and the fully mixed immersion filtration multi-stage aeration tank 80 is carried out sintered material micro-bubble generator for the filter bottle of the present invention as representative representation in the present invention, It will be described below in detail with reference to the drawings.

Inflow water is passed through the anaerobic tank 14 and the anaerobic tank 15 corresponding to the biological shear of the wastewater to the immersion filtration intermittent aeration tank 70 is installed sintered material microbubble generator (20,30,40,50,60) Inflow. The introduced raw water is aerated by a blower (10, blower to compressor), which is an air supply means, and microbubbles 71 generated from the sintered material microbubble generators 20, 30, 40, 50, and 60 for the filter bottles of the present invention. A portion of the activated sludge collected by the sludge pit 76 due to gravity settling and agitation is conveyed to the front ends of the multifunctional aeration tanks 70 and 80 to be used as a feed material for the microbial mechanism, and some of the excess sludge is sludge. It is drawn / removed to the cake state via the thickening tank / digestion tank 6 and the dehydrator 7.

13A and 13B, when the dissolved oxygen concentration (DO) value of the immersion filtration multifunction aeration tanks 70 and 80 reaches the DO value set by the aeration of the microbubble 71, the aeration process is stopped. During the process, raw water is filtered / sucked by the liquid suction pump 74 and the porous sintered body 20, 30, 40, 50, 60 of the present invention, and is transferred to the treatment tank 5. That is, in Figure 13a and Figure 13b, the porous sintered body (20, 30, 40, 50, 60) of the present invention is operated as a microbubble generator during aeration, as a filtration / separation means for filtering the fine water contaminated particles in the aeration rest period It is a multifunctional altitude water treatment device that is operated.

When the filtration / suction process of the liquid phase progresses and pore blockage, or blockage, due to water pollution particles occurs in the porous sintered body of the present invention, the pressure drop sensor 75 measures the pressure difference between the front and rear ends of the liquid suction pump 74. By the pressure drop (ΔP, pressure drop) value is increased to ^2.0 _~ 3.5 kg _f / cm ² , the pore blockage is detected by the pressure drop sensor 75, the filtration / suction process of the liquid phase is stopped In addition, the aeration process is performed again by the air blower (10). In the aeration process by the air blower 10, the pores of the occluded porous sintered body (20, 30, 40, 50, 60) is a back-washing process that is naturally restored to the original state, the porous When pores of the sintered body are excessively occluded, the +/- electrical terminals of the liquid suction pump 74 are automatically converted so that the suction direction is reversed, and the suction pump 74 is a back-washing pump. In operation, the pores of the blocked porous sinters 20, 30, 40, 50, and 60 are assisted to recover the initial state. In other words, the porous sintered body of the present invention is automatically cleaned by the air aeration in its operation mode, by switching from the liquid suction pump 74 to the backwash pump. Filtration / suction process of the porous sintered body and the backwashing process by the liquid phase are described in detail in Korean Patent Publication No. 10-2010-0056429.

According to the present invention, in the sewage and wastewater treatment process, the pore size of the porous sintered bodies 20, 30, 40, 50 and 60 for filter bottles is preferably 0.1 to 100 m. If the porosity of the porous sintered body is too large, 100 μm or more, the size of the bubbles generated is not only large, but also lowers the oxygen transfer efficiency, while the amount of water passing through the filtration / suction process of the liquid phase is large, while water pollution fine particles and fine floc are effectively filtered and separated. On the contrary, if the pore is too small (0.1 μm or less), the pressure sintering of the porous sintered body may cause a lot of pressure loss, and it may not only impose the liquid suction pump 74 but also use a back-flushing process. This is not true.

According to FIG. 13B of the present invention, in the immersion filtration microbubble aeration tank 70, the porous sintered body 20, in order to prevent pore blockage, ie blockage, of the porous sintered body 20, 30, 40, 50, 60 is maximized. An air diffuser 60, which is a means for generating coarse bubbles 85, is provided below the 30, 40, 50, 60, and the coarse bubbles 85 generated from the diffuser 60 are formed of a porous sintered body 20, The surface of the surface 30, 40, 50, 60 is continuously or periodically cleaned, the coarse bubble diffuser 60 may utilize a conventional diffuser (Fig. 3), or may use the porous sintered body of the present invention. In order to use the porous sintered body, the horizontal installation type sintered material bubble generator 60 provided with the bubble diffusion induction plate 61 of the present invention is installed horizontally, but the porous constituting the horizontal installation type sintered material bubble generator 60 is provided. The pores of the sintered body are the pores of the porous sintered body 20, 30, 40, 50 for generating microbubbles. More significantly to the 10~100 μm is preferred to thereby generate a coarse bubbles, surface cleaning and stirring effect of the activated sludge of a porous sintered body (20,30,40,50) is that more than a glass carriage jodaegi microbubbles. In addition, by separately installing an air blower 82 that can be operated independently of the horizontal installation type sintered material bubble generator (60) equipped with a bubble diffusion induction plate 61, the complete mixed immersion filtration multi-stage aeration tank (80) for a long term It is preferable to configure so that it can drive to aeration.

The immersion filtration intermittent aeration tank 70 of FIG. 13A to which the sintered material micro-bubble generator 20, 30, 40, 50, 60 for the present filter filter is applied, and the configuration of the fully mixed immersion filtration multistage aeration tank 80 of FIG. In a typical standard activated sludge process (FIG. 1) and a biological advanced treatment process (FIG. 2), an aeration tank (3 to 16) + final sedimentation tank (4) + sand filter (8) + activated carbon filter (9) is used as one. Multifunction tanks (70, 80) to be able to process all, it can be said to be effective in economic aspects, such as installation site reduction and ease of operation.

On the other hand, in drinking water treatment facilities such as water treatment, village water supply / ground water, the immersion filtration intermittent aeration tank (70) of Figure 13a to which the sintered material microbubble generator (20, 30, 40, 50, 60) for the filter bottle of the present invention is applied and When the fully mixed immersion filtration multi-stage aeration tank 80 of FIG. 13B is used, it is possible not only to remove volatile organic compounds (VOCs) including radon (Rn, Radon), which are natural radioactive substances, but also to dissolve the oxygen concentration ( Increase DO) to provide healthy drinking water. According to a 2010 press release from the Ministry of Environment, a survey of 474 village waterworks and groundwater showed that radon (Rn), a carcinogenic substance, exceeded US drinking water proposals at 106 sites (22.4%). Since it is volatile in water, there is a report that can be reduced by 60% even in general aeration, it can be easily reduced by 60% or more by applying the aeration method by the micro-bubbles of the present invention.

Fig. 14 is an elevational view of a typical conventional pressurization tank 90, showing a general method of generating microbubbles under high pressure in the pressurization tank 90. The sintered material ultra-micro-foam generator 101 of the present invention is cascaded. In this case, the ultra-fine bubble (102, ultra-fine bubble) without the high-pressure pump 91, the dissolved oxygen pressure tank 92, the gas dispersion plate 95 and the microbubble rising induction wall 99 is provided ) Can be easily generated as well as the circulation of the treated water is not necessary, so that the overall throughput of the pressurized part is greatly increased.

On the other hand, the Republic of Korea Patent Registration 10-0844141 relates to a ceramic diffuser for generating ultra-miniature air bubbles to float the contaminants in the water, uniformly and consistently generate ultra-miniature air bubbles with low air pressure of about 1 atmosphere On the other hand, the ceramic diffuser is manufactured by pressurizing while applying vibration, or by extrusion molding method, so that the silica or alumina powder fine particles are gradually moved from the surface to the inner center. Forming a wide pore distribution with a large pore size, and the ceramic material has the disadvantage of being 'brittle' even at a small impact, the ultra-fine foam generator of metal or synthetic resin material (101) produced by the sintering method of the present invention (101) The above disadvantages can be solved.

15 is an embodiment of the submerged flotation tank 100 in which the present sintered material ultra-micro-foam generator 101 is performed, the porous sintered body for generating the micro-micron (μm) sized ultra-micro-bubbles (102) The pores of the size is 0.01 ~ 0.1μm, it is preferable to induce the upward flow path of the ultra-mini-foamed cloth 102 by installing stepped.

Claims (5)

In the micro bubble generator for filter bottles,
Porous sintered body, which is a microbubble generating unit,
Stainless steel powder to synthetic resin fine powder as a raw material,
To have a uniform pore size distribution and high porosity; And
In order to ensure that the pore shape and pore size do not deform even after long operation,
Manufactured by sintering method,
To generate uniform and fine bubbles in water; And
Bubble diffusion induction plate of any one of the horizontal type 21, the inclined type 31, the multi-tilt type 41, the rotary type 51, the horizontal installation type 61 on one side of the microbubble generator for the filter bottle manufactured by the sintering method (bubble spreading device) is provided,
Induces uniform microbubbles generated from the microbubble generator to be widely dispersed / diffused in water; And
Microbubble generator for the filter bottle manufactured by the sintering method,
At the time of aeration, micro bubbles are generated to stir activated sludge while delivering oxygen to aerobic microorganisms; And
In the aeration stop, water pollution fine particles can be separated and filtered,
Advanced water treatment method characterized in that the multi-function sintered material micro-bubble generator for the filter bottle. The method according to claim 1,
When the pore blocking phenomenon of the porous sintered compact for the filter bottle is detected by the suction / filtration differential pressure sensor 75,
Own aeration mode; And
The +/- electrical terminals of the liquid suction pump 74 are automatically converted so that the liquid suction direction is reversed, and the suction pump 74 is operated as a backwash pump of the porous sintered body.
Advanced water treatment method characterized in that the air back to the air + liquid backwashing process to restore the pores of the porous sintered body to the initial state automatically. In the micro bubble generator for filter bottles,
Porous sintered body, which is a microbubble generating unit,
Stainless steel powder to synthetic resin fine powder as a raw material,
To have a uniform pore size distribution and high porosity; And
In order to ensure that the pore shape and pore size do not deform even after long operation,
Manufactured by sintering method,
To generate uniform and fine bubbles in water; And
Bubble diffusion induction plate of any one of the horizontal type 21, the inclined type 31, the multi-tilt type 41, the rotary type 51, the horizontal installation type 61 on one side of the microbubble generator for the filter bottle manufactured by the sintering method (bubble spreading device) is provided,
Induces uniform microbubbles generated from the microbubble generator to be widely dispersed / diffused in water; And
Microbubble generator for the filter bottle manufactured by the sintering method,
At the time of aeration, micro bubbles are generated to stir activated sludge while delivering oxygen to aerobic microorganisms; And
The aeration stop is characterized in that the water pollution fine particles can be separated / filtered,
Characterized in that the aeration tank + sedimentation tank + filter can be processed in one multifunctional tank (70, 80),
An immersion filtration-type multifunctional aeration tank in which the sintered material microbubble generator for the filter bottle is carried out. In aeration facilities of drinking water treatment such as water treatment, village water supply / groundwater,
Porous sintered body, which is a microbubble generating unit,
Stainless steel powder to synthetic resin fine powder as a raw material,
To have a uniform pore size distribution and high porosity; And
In order to ensure that the pore shape and pore size do not deform even after long operation,
Manufactured by sintering method,
To generate uniform and fine bubbles in water; And
Bubble diffusion induction plate of any one of the horizontal type 21, the inclined type 31, the multi-tilt type 41, the rotary type 51, the horizontal installation type 61 on one side of the microbubble generator for the filter bottle manufactured by the sintering method (bubble spreading device) is provided,
Induces uniform microbubbles generated from the microbubble generator to be widely dispersed / diffused in water; And
Microbubble generator for the filter bottle manufactured by the sintering method,
At the time of aeration, microbubbles are generated to reduce volatile organic compounds (VOC) including radon (Rn), which is a natural radioactive substance, as well as to increase the dissolved oxygen concentration (DO) of drinking water; And
The aeration stop is characterized in that to separate / filter the micro-contamination particles of drinking water,
Drinking water advanced processing method provided with the sintered material micro-bubble generator for the filter bottle. In the ultra-mini-foam generator for water pollutant particles,
The porous sintered body which is the ultra-micro-foam generation part,
Stainless steel powder to synthetic resin fine powder as a raw material,
To have a uniform pore size distribution and high porosity; And
In order to ensure that the pore shape and pore size do not deform even after long operation,
Manufactured by sintering method,
On one side of the ultra-fine foam generator 101 manufactured by the sintering method is provided a horizontal installation type bubble diffusion guide plate 61,
Uniform micro-bubbles generated from the ultra-miniature bubble generator are induced to be widely dispersed / diffused in water; And
By installing the ultra-mini-foam generator 101 manufactured by the sintering method in a stepwise manner to induce a rising flow path of the ultra-mini-foam fabrics 102,
Without high pressure pump for liquid circulation, dissolved oxygen pressure tank, microbubble rising induction wall; And
Without circulation of treated water,
Water contaminant floating tank (100), characterized in that to generate uniform microscopic bubbles in the micron (μm) size in the water from the ultra-miniature bubble generator 101 manufactured by the sintering method.

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